//
//  AfanVisitorView.swift
//  weibo
//
//  Created by afan on 16/3/25.
//  Copyright © 2016年 阿范. All rights reserved.
//

/*
代理的创建
1.定义协议,继承和类的格式是一样的,不是OC的<NSObject>, 当协议方法定义为 optional,协议需要加上@objc
2.定义方法
3.定义代理属性 id <CZVisitorViewDelegate>
4.调用代理的方法
*/


import UIKit
@objc protocol AfanVisitorViewDelegat:NSObjectProtocol{
    // 注册按钮被点击
    optional func visitorViewDidClickRegisterButton()
    
    // 登陆按钮被点击
    optional func visitroViewDidClickLoginButton()
}



class AfanVisitorView: UIView {

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
   
    
    weak var delegate : AfanVisitorViewDelegat?
    
    
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        prepareUI()
    }

    //MARK: 外界调用
    /// 用来设置子控件的参数
    func setupVisitor(imageName: String, message: String) {
        homeView.hidden = true
        
        // 付控件将一个子控件推到最底部
        self.sendSubviewToBack(coverView)
        
        iconView.image = UIImage(named: imageName)
        messageLabel.text = message
    }
    
    /// 开始旋转
    func startRotation() {
        let rotation = CABasicAnimation(keyPath: "transform.rotation")
        rotation.toValue = M_PI * 2
        rotation.duration = 20
        rotation.repeatCount = MAXFLOAT
        
        // 完成的时候不要移除
        rotation.removedOnCompletion = false
        
        // 添加到图层上面
        iconView.layer.addAnimation(rotation, forKey: nil)
    }
    

    
    //MARK: 准备UI
    private func prepareUI() {
        backgroundColor = UIColor(white: 237 / 255.0, alpha: 1)
        
        // 1.添加子控件
        addSubview(iconView)
        addSubview(coverView)
        addSubview(homeView)
        addSubview(messageLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        
        // 2.添加约束
        iconView.translatesAutoresizingMaskIntoConstraints = false
        coverView.translatesAutoresizingMaskIntoConstraints = false
        homeView.translatesAutoresizingMaskIntoConstraints = false
        messageLabel.translatesAutoresizingMaskIntoConstraints = false
        registerButton.translatesAutoresizingMaskIntoConstraints = false
        loginButton.translatesAutoresizingMaskIntoConstraints = false
        
        // 转轮
        /*
        1.item: 要约束的View
        2.attribute: 要约束的view的属性
        3.relatedBy: 参照
        4.toItem: 参照的View
        */
        // 约束要添加,约束统一添加到付控件上面
        addConstraint(NSLayoutConstraint(item: iconView, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: iconView, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: -40))
        
        // 遮罩
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Leading, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.Leading, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Trailing, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.Trailing, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.Top, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Bottom, relatedBy: NSLayoutRelation.Equal, toItem: registerButton, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))
        
        // 小房子
        addConstraint(NSLayoutConstraint(item: homeView, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: homeView, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: 0))
        
        // 消息label
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 16))
        
        // 当toItem = nil时, attribute一定要设置为: NSLayoutAttribute.NotAnAttribute
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 250))
        
        // 注册按钮
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Leading, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Leading, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 16))
        
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 100))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 35))
        
        // 登录按钮
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Trailing, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Trailing, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 16))
        
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: registerButton, attribute: NSLayoutAttribute.Width, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: registerButton, attribute: NSLayoutAttribute.Height, multiplier: 1, constant: 0))
    }
    
    // MARK:点击事件
    ///注册
    @objc private func didClickRegisterButton() {
        delegate?.visitorViewDidClickRegisterButton?()
    }
    ///登录
    @objc private func didClickLoginButton() {
        delegate?.visitroViewDidClickLoginButton?()
    }
    
    
    
    
    // MARK: - 懒加载
    /// 转轮
    private lazy var iconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    
    /// 遮罩
    private lazy var coverView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    
    /// 小房子
    private lazy var homeView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    
    /// 消息label
    private lazy var messageLabel: UILabel = {
        let label = UILabel()
        
        // 设置
        label.text = "关注一些人,看看有什么惊喜!!"
        label.textAlignment = NSTextAlignment.Center
        label.font = UIFont.systemFontOfSize(18)
        label.numberOfLines = 0
        label.sizeToFit()
        
        return label
    }()
    
    /// 注册按钮
    private lazy var registerButton: UIButton = {
        let button = UIButton()
        
        // 设置
        button.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: UIControlState.Normal)
        
        //        button.titleLabel: 不要使用这个来设置按钮的label
        button.setTitle("注册", forState: UIControlState.Normal)
        button.setTitleColor(UIColor.orangeColor(), forState: UIControlState.Normal)
        
        // 添加点击事件
        button.addTarget(self, action: "didClickRegisterButton", forControlEvents: UIControlEvents.TouchUpInside)
        
        return button
    }()
    
    /// 登录按钮
    private lazy var loginButton: UIButton = {
        let button = UIButton()
        
        // 设置
        button.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: UIControlState.Normal)
        
        button.setTitle("登录", forState: UIControlState.Normal)
        button.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
        
        // 添加点击事件
        button.addTarget(self, action: "didClickLoginButton", forControlEvents: UIControlEvents.TouchUpInside)
        return button
    }()
}
